Iansan Build Guide

Natlan teammates:

Mavuika

Iansan tends to be one of Mavuika’s best teammates, particularly at C6. She remains one of her best options at C2, but not necessarily incredible before C2. By far the best option for Overload, and will typically be about as good as Xilonen in most teams starting at her C2, outdoing her when at C6.

Varesa

Varesa’s most important teammate most of the time, regardless of team archetype. C6 makes her the uncontested best, but C2 is still excellent. Varesa is quite Iansan reliant, even though the opposite isn't true.

Kinich

C6 Iansan can be better than Emilie alongside Durin and Nicole, while C2 is a very good but not necessarily the best option. Iansan can have some difficulty consistently reacting with Dendro, which makes Scroll of the Hero of Cinder City less reliable than in most teams.

Chasca

Chasca’s best ATK buffing option most of the time, at least alongside Nicole. Typically better than Bennett at C2+ due to how strong Scroll is for Chasca.

Non-Natlan teammates:

Clorinde moves enough to generally maintain Iansan’s buff uptime, though you can run into rotational downtime due to Clorinde's low on-field uptime. Iansan’s buffs are comfortably stronger than Bennett's here due to Clorinde's ATK Cap, and better than Nicole if Iansan is at C6.

Gaming moves more than enough to always maintain Iansan’s buff at its maximum thanks to his constant Plunge Attacks. Greatly synergistic.

Varka's Electro teams nigh require Iansan. She's only real buffing option for Electro Varka teams, which, while not particularly good Varka teams, can still have their uses.

Arlecchino can somewhat maintain Iansan’s buff by dashing backwards from the enemy after every Normal Attack sequence, as her Normal Attacks move her very forward and towards the enemy. Rarely the best option for an Arlecchino team, but can be usable sometimes.

Any other DPS that likes what Iansan provides and/or can maintain her buff uptime will work decently with Iansan. A character like Sandrone can have some limited synergy with her, as can Raiden Shogun.

BiS Option: Symphonist of Scents

Escoffier’s signature is a top tier buffing option if Iansan can otherwise meet her Energy Requirements with it. It does not provide any extra Energy, but the 32 ATK% to the on-fielder will make Iansan the strongest single-target buffer in the game. Iansan's healing has a long enough duration to make this full uptime.

Energy option: Favonius Lance

Thanks to the really high Base ATK, Iansan typically won’t have to sacrifice any of her buff capacity to use this. Especially good in Stygian Onslaught.

Energy alternative: Tamayuratei no Ohanashi

If Favonius isn’t necessary or build requirements seem strict, this will certainly do. It does make Iansan provide a little less to the team, but it is great for her own needs.

Other ER Weapons: Can be okay if you don’t have Fav or Tamayuretai, but both are significantly recommended over other options.

BiS Option: Scroll of the Hero of Cinder City

One of the best buffing sets in the game, and Iansan tends to be a great user of it. The Energy from the 2pc is quite useful on her.

Alternative: Noblesse Oblige

If there’s another good or more desirable Scroll holder like Citlali on the team, opt for this on Iansan instead. Can make Energy requirements harder to reach, but should still be fine.

1. Elemental Burst

Iansan's other talents only provide a negligible amount of extra personal damage. Her Elemental Burst contains the majority of her buffing.

Overview

Iansan is an ATK-buffing Support for the on-fielder, with some minor healing on the side. In order to maintain her buff's potency and duration, the on-field character will have to perform movement. This can include any movement, whether vertical or horizontal. Many on-field DPS, including most from Natlan, will naturally do this. Some will have to intentionally adjust their movement and combos, and some simply don't have the ability to do so. This makes Iansan less generic than someone like Bennett, but the trade-off tends to be that her buffs are stronger than almost anyone else's, at least with a few Constellations.

Elemental Skill & Nightsoul's Blessing

Iansan’s Elemental Skill will have her dash forward and deal Electrto damage to all enemies struck. She will gain 54 Nightsoul Points (which is also her maximum) and enter her Nightsoul’s Blessing state. Movement actions like dash will consume her Nightsoul, and she will also consume 6 Nightsoul a second at a baseline. In this state, she will gain access to a special Charged Attack, which she can also trigger by using regular Normal Attacks for the first 5 seconds. Using this special Charged Attack will be very relevant for her buffing ability before C2, but C2 removes the need to use it.

If this Skill hits an enemy, it will generate 4 Electro Particles. It has a 16 second cooldown. Iansan can also Hold this Skill, but this is only relevant for exploration purposes.

Elemental Burst

Iansan’s Elemental Burst has an Energy cost of 70 and a cooldown of 18 seconds. On cast, she will deal some Electro DMG in an AoE around her, gain a few Nightsoul Points, and while in her Nightsoul’s Blessing state, she will create a ‘Kinetic Energy Scale’ that tracks the active character. When Iansan’s Nightsoul is above 42 points she will buff the active character’s attack by a large portion of her own Total ATK. When Iansan’s Nightsoul character is below 42 points, this buffing will take a significant hit and scale on the amount of Nightsoul she has, at 0.5 ATK% per Nightsoul point.

This effect has a cap on the amount of ATK she can buff the active character that scales with the Burst’s talent level. It also has a maximum duration of 12 seconds at C0, though it becomes 15 seconds at C6.

Kinetic Energy Scale Details

While the Kinetic Energy Scale is active, it will track the active character’s movement, and will give Iansan Nightsoul Points in intervals of 1 second based on the distance they traveled within that second. More specifically, Iansan will gain 1 Nightsoul per 2 meters the active character travels.

This includes ALL movement, regardless of direction. Kinich and Mavuika are characters that will move a lot in a horizontal manner with their spinning, while Varesa is a character that moves a lot vertically with her plunging. All of these characters are able to comfortably maintain Iansan at above 42 Nightsoul. Iansan is not recommended to be played with characters that cannot maintain her Nightsoul Points at a high amount consistently. Remember, Iansan’s consumption per second is 6 at a baseline, which means that without anything else she would require 12 meters of traveling pre second to maintain this.

Nightsoul Generation & Ascension Passives

Iansan can help her Nightsoul generation through her Ascension 1. If Iansan uses her special Charged Attack, she will gain the Precise Movement effect for 15 seconds. This increases her ATK by 20% (counting towards her buff) and ALL Nightsoul generation for herself will be increased by 1 Nightsoul Point, regardless of how much it was. If the active character consumes or generates Nightsoul for themselves, Iansan will additionally give herself 4 Nightsoul. This effect has a cooldown of 2.8 seconds.

With both of these effects, if the character the Kinetic Scale is tracking is a Nightsoul character, Iansan will only require 4-6 meters of movement per second.

Iansan’s Ascension 4 passive will have her heal the active character for 60% of her attack when she’s in the Nightsoul’s Blessing state. It also has a cooldown of 2.8 seconds, and is active for 10 seconds after a character triggers Nightsoul Burst. This should generally have full uptime.

Iansan can also gain the Precise Movement effect through just casting her Elemental Burst if she’s at C2 or higher. This allows her to skip using her special Charged Attack and makes it easier to catch certain Elemental Particles. It also saves on a bit of rotation time, making this Constellation very valuable even beyond the 30 ATK%.

There are characters that can maintain Iansan’s Nightsoul that aren’t Nightsoul characters. The main examples are Plunge carries like Gaming through their significant vertical movement, Clorinde through her Elemental Skill’s horizontal movement, as well as Arlecchino by dashing backwards and letting her Normal Attacks’ tracking move her back towards the enemy.

Iansan was officially released as a playable 4-star Electro character in Genshin Impact on March 26, 2025, during the Version 5.5 update.